/Engine/Plugins/Runtime/MassEntity/Source/MassEntity/Public/MassEntityTypes.h
The type summarily describing a composition of an entity or an archetype. It contains information on both the fragments as well as tags
struct FMassArchetypeCompositionDescriptor
FMassChunkFragm...
ChunkFragments
FMassFragmentBi...
Fragments
FMassSharedFrag...
SharedFragments
FMassTagBitSet
Tags